A metal plate of thickness d/2 is introduced in between the plates of a parallel plate air capacitor with plate separation of d. Capacity of the metal plate :
Decreases 2 times
Remains same
Increases 2 times
Becomes zero
A
Increases 2 times
B
Remains same
C
Decreases 2 times
D
Becomes zero
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Solution
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C=ϵoAd
when a dielectric is filled ,thickness t
C1=ϵoAd−t+tK
for metal k= infinity ,t=d2
C1=2ϵoAd=2C
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